CN1286820A - Method and device for ion generation - Google Patents

Abstract

A method of high efficiency generation of ions of desired polarity which includes the steps of positioning a first electrode at a predetermined spacing from a second electrode having a closed shape configuration, applying to both electrodes a direct voltage of the same polarity, at the same time as applying the direct voltage, applying high voltage pulses to the first electrode only, thereby to cause ion generation in the vicinity of the first electrode and to set up a rapidly moving ion stream from the first to the second electrode along an electrical field therebetween, wherein the duration of the pulses is shorter than the time taken for the ion stream to reach the second electrode, and wherein ions in the ion stream have the same polarity as the second electrode, thereby to the repelled and concentrated as they flow through the second electrode. The method may also include the generation of a stream of ions, with reduced ozone content, which includes the additional step of applying a negative pressure gradient to the ion stream, thereby to deflect ozone generated by the corona discharge to a direction different from that of the flow of ions.

Description

Generate the method and apparatus of ion

The present invention relates to the generation of ion.

As everyone knows, in the corona discharge field, except generating ion, also can generate neutral ozone molecule simultaneously.

In the prior art, the generation method and apparatus of ion is that the air stream that utilizes fan or air compressor to produce is discharged ion in the corona system.Therefore, flow to the ion flow of ion generator outlet with the flow direction outlet together of air stream.

Because in corona discharge process, the speed of air stream and the velocity contrast of ion flow are very big, sizable a part of ion flow is still stayed in the system.Like this, utilize known method and known devices, from the coefficient of the ion of ion generator output, i.e. the ionic weight of ion generator outlet is still very low with the ratio of the number of ions that ion generator produces.

When discharging ion, all ozone that produce in this corona system have also all been discharged by air stream.

Following patent documentation has been represented the present situation of this area: PCT application WO 95/19225, and title is " aircleaning facility ", and No. the 5055963rd, United States Patent (USP), and title is " the bipolar air ion maker of self-balancing ", and they have adopted fan.95/19225 li of WO, a fan is arranged, so that produce the leaked-in air stream that will clean, 5055963 li of USP, with a fan " by air intake duct air is blown in the housing, and air is derived housing ... ", " thereby in air stream process output airway; cation and anion are mixed ... ", the 3rd hurdle, 4-9 is capable.

The present invention will provide a kind of method and apparatus that generates ion, it to be characterized as its efficient more much higher than the efficient of known method in the prior art and device.

The present invention also will provide a kind of method and apparatus, be used for reducing the ozone that this device generates significantly, and the generation of this ozone is the generation that is accompanied by the ozone of corona discharge.

The term here " efficient " refers to respect to the cumulative volume that produces, the shared share of ion that the ion generating apparatus produces.Here, efficient also is called ion output factor (coefficient of ionexit).

Therefore, a preferred embodiment of the present invention provides a kind of method, be used for generating efficiently the ion of required polarity, it may further comprise the steps: placing first electrode from the place of second electrode one preset distance with closed proterties structure, apply the dc voltage of same polarity for these two electrodes, when applying dc voltage, apply high-voltage pulse only for first electrode, thereby near first electrode, produce ion, along the electric field between first electrode and second electrode, between first electrode and second electrode, set up the ion flow of rapid movement, wherein the duration of high-voltage pulse arrives second needed time weak point of electrode than ion flow from first electrode, and wherein the ion in the ion flow is identical with the polarity of second electrode, thereby is repelled in second electrode of flowing through and converge.

In addition, according to a preferred embodiment of the invention, the coefficient of output ion is applied to dc voltage on the electrode by adjusting and adjusted.

According to another embodiment of the invention, also provide a kind of device of realizing said method.

According to another embodiment of the present invention, a kind of method that generates ion flow is provided, ozone content has wherein obtained reduction, this method comprises, place first electrode on second electrode opposite, between first electrode and second electrode, apply predetermined electric charge, thereby produce an ion flow by corona discharge; And apply a negative pressure gradient for this ion flow, thereby the ozone that corona discharge process is produced becomes to flowing with the different direction of ion flow.

The present invention also provides a kind of device that is used to realize this method.

By following detailed introduction, and with reference to the accompanying drawings, can more fully understand content of the present invention, in these accompanying drawings:

Fig. 1 is a schematic diagram according to the ion generating apparatus of preferred embodiment formation of the present invention and work.

With reference now to Fig. 1,, the ion generating apparatus that wherein drawn is represented this whole device with 100, and this device constitutes according to a preferred embodiment of the present invention and works.This device 100 comprises a housing 102, and it has an ante-chamber 104, generates ion flow therein, also has a back cavity 106, in being used for and ozone.Ante-chamber 104 and jockey 108 of back cavity 106 usefulness couple together, and this jockey is the outlet of ozone, will illustrate below about jockey.

Ante-chamber has an active (active) electrode 5 for 104 li, is used for producing ion by corona discharge, and its shape generally all is a needle-like, can certainly adopt any other suitable shape.Ante-chamber has an ion outlet, represents in outlet passive (passive a) electrode 6 is arranged with 7.By moving electrode 6 for example is a circle or ring, but also can adopt any other close-shaped electrode to replace it.

Back cavity has a negative pressure source for 106 li, represents with 2, and for example be air exhauster and so on.Under the effect of negative pressure source 2, the ozone that produces in the ion generative process, by a suction strainer 3, for example active carbon filter is got rid of from upstream side ozone outlet 108.

Usually, according to needed ion polarity, give active electrode 5 and applied a constant dc voltage respectively by moving electrode 7.

Meanwhile, to active electrode apply a preset frequency with respect to by the high-voltage pulse of moving electrode, its polarity is corresponding to needed ion polarity, thereby set up an electric field at active electrode 5 with between by moving electrode 7, make ion in the duration of pulse along electric field, towards by moving electrode 7 diffluences.The duration that will have the high-voltage pulse of specific amplitude is chosen to arrive by the time of moving electrode weak point than ion.During high-voltage pulse, because well-known corona discharge phenomenon produces cation, anion and neutral ozone molecule at the tip of active electrode.

Under the effect of electric field force, ion begins to fly to by moving electrode from active electrode with higher relatively speed, and velocity interval is the every volt of 1-2 centimeters per second.If the voltage of high-voltage pulse is 6 kilovolts, the speed of ion flow is exactly the 6000-12000 centimeters per second so.

Under specific amplitude, select the duration of high-voltage pulse to such an extent that move to by the needed time weak point of moving electrode from active electrode, thereby ion can not be arrived by moving electrode within the duration of pulse than ion.

As mentioned above, these two electrodes all follow a common current source to connect.Therefore, between pulse and pulse, the amplitude of voltage is all identical with polarity on these two electrodes, and their polarity is identical with the polarity of ion flow intermediate ion.In this following period of time, although do not have electric field between these two electrodes, but under action of inertia, ion flow still continues towards being moved by the direction of moving electrode 7, and because ion and all carried the electric charge of identical polar by moving electrode 7, this ion flow is repelled by electrode 7, thereby ion flow is converged, from the outlet output of this device.So just make this device obtain very high ion remaval coefficient.

Export 108 negative pressure gradient that produce and the neutralization of suction strainer 3 by fan or air compressor 3 through ozone, the ozone that produces in the ion generative process is removed, thereby the ozone in the ion flow is removed.The speed of removing ozone can reach, 100 centimeters per seconds for example, and it is more much lower than the speed of ion flow, is the 6000-12000 centimeters per second in the velocity interval of above-mentioned example intermediate ion stream.

With reference now to Fig. 1,, can see that to fan 2 power supplies, fan 2 is placed on 1 li of housing by electric wire 8, like this, the air stream that its produces just flows to ozone from ion remaval mouth 7 and removes mouth 4.Needed pulse of this new method and direct voltage are by commutating and obtain from the flow through electric current of primary coil 15 of high voltage pulse transformer 9 of direct voltage source 17.Transistor 13 is used as commutation element (commutating element).Damper diode 14 is used to export the voltage of opposite polarity.

Pulse frequency is by commutating pulse generator (commutative pulse generator) 11 decisions.The binding post 10 of commutating pulse generator 11 connects with the base stage of transistor 13, and the collector electrode of transistor 13 then connects with the negative electrode of diode 14, and also the end with transformer 9 primary coils 15 connects.The front end of coil 15 connects with positive terminal 16 of direct voltage source 17, and its negative terminals 18 then follows the binding post 12 of emitter, earth point 19 and the commutating pulse generator 11 of the anode of diode 14, transistor 13 to be connected.

Pulse voltage on the primary coil 15 is boosted by transformer 9, produces high-voltage pulse on the secondary coil 20 and 21 of high voltage pulse transformer 9.

The front end of coil 20 links to each other with active electrode 5, and the end of coil 20 is followed by a pole plate of the front end of moving electrode 6, coil 21 and capacitor 23 and linked to each other.Second pole plate of capacitor 23 links to each other with the negative electrode of diode 22, and links to each other with earth terminal 19 through resistance 24.The anode of diode 22 links to each other with the end of coil 21.

Pulse voltage on the coil 21 gives capacitor 23 chargings, makes its voltage reach peak value, and capacitor 23 is used as direct voltage source.For the sake of security, limit current strength with a resistor 24.

Obviously, foregoing circuit just is used to describe, as long as can realize the function introduced previously, can adopt any other device.

By non-limiting instance, can constituent apparatus 100, and allow it work in such a way:

1. active electrode and passive distance between electrodes " d " approximately are 0.5 millimeter;

2. the amplitude of high-voltage pulse approximately is 6 kilovolts;

3. the pulse duration approximately is 1 microsecond;

4. pulse frequency approximately is 5 KHz;

5. the direct voltage that is added on electrode 5 and the electrode 7 approximately is 2.4 kilovolts, and electric current is approximately 1 microampere.

The inventor finds, creates and works according to above-mentioned technical specification, and the efficient of device 100 is approximately 80%.

Technical staff in this area passes through to increase the amplitude and the frequency of high-voltage pulse, and by several active electrodes being installed in housing and by moving electrode, can being increased electric current.

For the technical staff in this area, the present invention is not limited to above-mentioned explanation.On the contrary, scope of the present invention is provided by following claim.

Claims (11)

1. ion method that is used for producing efficiently required polarity, this method may further comprise the steps:

First electrode and second electrode predetermined distance of being separated by is placed, and the structure of second electrode is a kind of close-shaped;

Apply the direct voltage of identical polar for these two electrodes;

When applying above-mentioned direct voltage, only on first electrode, apply high-voltage pulse, near thereby generation ion first electrode, and along the electric field between these two electrodes at the ion flow that forms rapid movement between first and second electrode, wherein the duration of high-voltage pulse arrives second needed time weak point of electrode than ion flow

Wherein the polarity of ion is identical with the polarity of second electrode in the ion flow, thereby when they flow through second electrode, is repelled and converge.

2. the process of claim 1 wherein output ion coefficient regulate by the amplitude that change imposes on the direct voltage of these two electrodes.

One kind produce ion flow method, this method has reduced ozone content, it comprises:

Place first electrode on the opposite of second electrode, between first and second electrode, apply predetermined electric charge, thereby produce ion flow by corona discharge; With

Apply a negative pressure gradient for this ion flow, thereby make the flow direction of the ozone that corona discharge process produces become the direction different with the ion flow direction.

4. the method for claim 3, the step that wherein applies negative pressure gradient comprise allows flow of ozone flow to the direction opposite with the ion flow flow direction.

5. the method for claim 3 is wherein wrapped ozone-containing air stream through an appropriate filters, to remove ozone.

6. device is used for producing expeditiously the ion flow of required polarity, and this device comprises:

First and second electrode, their predetermined distances of being separated by;

Apply device to these two electrodes with respect to the direct voltage on ground;

The high-voltage pulse that applies the amplitude of pre-determining is given described first electrode, thus allow pulse ion stream at described impulse duration along the electric field of between these two electrodes, setting up, from the device of first electrode stream to second electrode,

Wherein the pulse duration gets up and will lack with second needed time ratio of electrode of ion flow arrival.

7. device according to claim 6, the device that wherein applies direct voltage comprise the device that applies the direct voltage of identical polar to first electrode and second electrode, and described polarity is also identical with the polarity of the ion that produces.

8. device that is used to produce ion flow, it comprises:

A housing, this housing have first opening and second opening;

First electrode between first and second opening;

Be positioned near second electrode second opening, with first electrode predetermined distance of being separated by;

Make first electrode and second electrode work, corona discharge takes place, make first electrode produce ion flow, flow to the device of second electrode;

Device between first electrode and first opening is used for applying a negative pressure to described enclosure interior, forms an air stream that flows to first opening from second opening, thereby removes the ozone that corona discharge produces.

9. device according to claim 8 also comprises a suction strainer, is used for and ozone, and it is positioned at the upstream side of described first opening.

10. according to each described device among the claim 6-9, wherein said first electrode is a needle electrode.

11. according to each described device among the claim 6-10, second electrode one wherein be as the annular.